X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=tests%2Ftest-vasnprintf-posix.c;h=53b679918700db079cee72e78486c74e27006ce7;hb=d90f751e2a857949f6eca74876dc0921bffa01d9;hp=a058fc97d2f39338321543e790dc63dab754fecf;hpb=e9bb23084ab2af1b2792808165335e6daebebfa9;p=gnulib.git

diff --git a/tests/test-vasnprintf-posix.c b/tests/test-vasnprintf-posix.c
index a058fc97d..53b679918 100644
--- a/tests/test-vasnprintf-posix.c
+++ b/tests/test-vasnprintf-posix.c
@@ -17,12 +17,11 @@
 
 /* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
 
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
+#include <config.h>
 
 #include "vasnprintf.h"
 
+#include <float.h>
 #include <stdarg.h>
 #include <stddef.h>
 #include <stdio.h>
@@ -30,6 +29,7 @@
 #include <stdlib.h>
 #include <string.h>
 
+#define SIZEOF(array) (sizeof (array) / sizeof (array[0]))
 #define ASSERT(expr) \
   do									     \
     {									     \
@@ -53,6 +53,60 @@ NaN ()
 # define NaN() (0.0 / 0.0)
 #endif
 
+/* The SGI MIPS floating-point format does not distinguish 0.0 and -0.0.  */
+static int
+have_minus_zero ()
+{
+  static double plus_zero = 0.0;
+  static double minus_zero = -0.0;
+  return memcmp (&plus_zero, &minus_zero, sizeof (double)) != 0;
+}
+
+/* Representation of an 80-bit 'long double' as an initializer for a sequence
+   of 'unsigned int' words.  */
+#ifdef WORDS_BIGENDIAN
+# define LDBL80_WORDS(exponent,manthi,mantlo) \
+    { ((unsigned int) (exponent) << 16) | ((unsigned int) (manthi) >> 16), \
+      ((unsigned int) (manthi) << 16) | (unsigned int) (mantlo) >> 16),    \
+      (unsigned int) (mantlo) << 16                                        \
+    }
+#else
+# define LDBL80_WORDS(exponent,manthi,mantlo) \
+    { mantlo, manthi, exponent }
+#endif
+
+static int
+strmatch (const char *pattern, const char *string)
+{
+  if (strlen (pattern) != strlen (string))
+    return 0;
+  for (; *pattern != '\0'; pattern++, string++)
+    if (*pattern != '*' && *string != *pattern)
+      return 0;
+  return 1;
+}
+
+/* Test whether string[start_index..end_index-1] is a valid textual
+   representation of NaN.  */
+static int
+strisnan (const char *string, size_t start_index, size_t end_index, int uppercase)
+{
+  if (start_index < end_index)
+    {
+      if (string[start_index] == '-')
+	start_index++;
+      if (start_index + 3 <= end_index
+	  && memcmp (string + start_index, uppercase ? "NAN" : "nan", 3) == 0)
+	{
+	  start_index += 3;
+	  if (start_index == end_index
+	      || (string[start_index] == '(' && string[end_index - 1] == ')'))
+	    return 1;
+	}
+    }
+  return 0;
+}
+	  
 static void
 test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
 {
@@ -175,7 +229,8 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     char *result =
       my_asnprintf (NULL, &length, "%a %d", -0.0, 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, "-0x0p+0 33") == 0);
+    if (have_minus_zero ())
+      ASSERT (strcmp (result, "-0x0p+0 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
@@ -205,7 +260,9 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     char *result =
       my_asnprintf (NULL, &length, "%a %d", NaN (), 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, "nan 33") == 0);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
@@ -434,11 +491,13 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
   { /* FLAG_ZERO with NaN.  */
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%010a %d", NaN (), 33, 44, 55);
+      my_asnprintf (NULL, &length, "%050a %d", NaN (), 33, 44, 55);
     ASSERT (result != NULL);
     /* "0000000nan 33" is not a valid result; see
        <http://lists.gnu.org/archive/html/bug-gnulib/2007-04/msg00107.html> */
-    ASSERT (strcmp (result, "       nan 33") == 0);
+    ASSERT (strlen (result) == 50 + 3
+	    && strisnan (result, strspn (result, " "), strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
@@ -484,7 +543,8 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     char *result =
       my_asnprintf (NULL, &length, "%La %d", -0.0L, 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, "-0x0p+0 33") == 0);
+    if (have_minus_zero ())
+      ASSERT (strcmp (result, "-0x0p+0 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
@@ -514,10 +574,113 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     char *result =
       my_asnprintf (NULL, &length, "%La %d", 0.0L / 0.0L, 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, "nan 33") == 0);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+#if CHECK_PRINTF_SAFE && ((defined __ia64 && LDBL_MANT_DIG == 64) || (defined __x86_64__ || defined __amd64__) || (defined __i386 || defined __i386__ || defined _I386 || defined _M_IX86 || defined _X86_))
+  { /* Quiet NaN.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0xC3333333, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%La %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  {
+    /* Signalling NaN.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0x83333333, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%La %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  /* The isnanl function should recognize Pseudo-NaNs, Pseudo-Infinities,
+     Pseudo-Zeroes, Unnormalized Numbers, and Pseudo-Denormals, as defined in
+       Intel IA-64 Architecture Software Developer's Manual, Volume 1:
+       Application Architecture.
+       Table 5-2 "Floating-Point Register Encodings"
+       Figure 5-6 "Memory to Floating-Point Register Data Translation"
+   */
+  { /* Pseudo-NaN.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0x40000001, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%La %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  { /* Pseudo-Infinity.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0x00000000, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%La %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  { /* Pseudo-Zero.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0x4004, 0x00000000, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%La %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  { /* Unnormalized number.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0x4000, 0x63333333, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%La %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  { /* Pseudo-Denormal.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0x0000, 0x83333333, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%La %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
+#endif
 
   { /* Rounding near the decimal point.  */
     size_t length;
@@ -744,11 +907,13 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
   { /* FLAG_ZERO with NaN.  */
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%010La %d", 0.0L / 0.0L, 33, 44, 55);
+      my_asnprintf (NULL, &length, "%050La %d", 0.0L / 0.0L, 33, 44, 55);
     ASSERT (result != NULL);
     /* "0000000nan 33" is not a valid result; see
        <http://lists.gnu.org/archive/html/bug-gnulib/2007-04/msg00107.html> */
-    ASSERT (strcmp (result, "       nan 33") == 0);
+    ASSERT (strlen (result) == 50 + 3
+	    && strisnan (result, strspn (result, " "), strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
@@ -775,6 +940,97 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     free (result);
   }
 
+  { /* Small and large positive numbers.  */
+    static struct { double value; const char *string; } data[] =
+      {
+	{ 1.234321234321234e-37, "0.000000" },
+	{ 1.234321234321234e-36, "0.000000" },
+	{ 1.234321234321234e-35, "0.000000" },
+	{ 1.234321234321234e-34, "0.000000" },
+	{ 1.234321234321234e-33, "0.000000" },
+	{ 1.234321234321234e-32, "0.000000" },
+	{ 1.234321234321234e-31, "0.000000" },
+	{ 1.234321234321234e-30, "0.000000" },
+	{ 1.234321234321234e-29, "0.000000" },
+	{ 1.234321234321234e-28, "0.000000" },
+	{ 1.234321234321234e-27, "0.000000" },
+	{ 1.234321234321234e-26, "0.000000" },
+	{ 1.234321234321234e-25, "0.000000" },
+	{ 1.234321234321234e-24, "0.000000" },
+	{ 1.234321234321234e-23, "0.000000" },
+	{ 1.234321234321234e-22, "0.000000" },
+	{ 1.234321234321234e-21, "0.000000" },
+	{ 1.234321234321234e-20, "0.000000" },
+	{ 1.234321234321234e-19, "0.000000" },
+	{ 1.234321234321234e-18, "0.000000" },
+	{ 1.234321234321234e-17, "0.000000" },
+	{ 1.234321234321234e-16, "0.000000" },
+	{ 1.234321234321234e-15, "0.000000" },
+	{ 1.234321234321234e-14, "0.000000" },
+	{ 1.234321234321234e-13, "0.000000" },
+	{ 1.234321234321234e-12, "0.000000" },
+	{ 1.234321234321234e-11, "0.000000" },
+	{ 1.234321234321234e-10, "0.000000" },
+	{ 1.234321234321234e-9, "0.000000" },
+	{ 1.234321234321234e-8, "0.000000" },
+	{ 1.234321234321234e-7, "0.000000" },
+	{ 1.234321234321234e-6, "0.000001" },
+	{ 1.234321234321234e-5, "0.000012" },
+	{ 1.234321234321234e-4, "0.000123" },
+	{ 1.234321234321234e-3, "0.001234" },
+	{ 1.234321234321234e-2, "0.012343" },
+	{ 1.234321234321234e-1, "0.123432" },
+	{ 1.234321234321234, "1.234321" },
+	{ 1.234321234321234e1, "12.343212" },
+	{ 1.234321234321234e2, "123.432123" },
+	{ 1.234321234321234e3, "1234.321234" },
+	{ 1.234321234321234e4, "12343.212343" },
+	{ 1.234321234321234e5, "123432.123432" },
+	{ 1.234321234321234e6, "1234321.234321" },
+	{ 1.234321234321234e7, "12343212.343212" },
+	{ 1.234321234321234e8, "123432123.432123" },
+	{ 1.234321234321234e9, "1234321234.321234" },
+	{ 1.234321234321234e10, "12343212343.2123**" },
+	{ 1.234321234321234e11, "123432123432.123***" },
+	{ 1.234321234321234e12, "1234321234321.23****" },
+	{ 1.234321234321234e13, "12343212343212.3*****" },
+	{ 1.234321234321234e14, "123432123432123.******" },
+	{ 1.234321234321234e15, "1234321234321234.000000" },
+	{ 1.234321234321234e16, "123432123432123**.000000" },
+	{ 1.234321234321234e17, "123432123432123***.000000" },
+	{ 1.234321234321234e18, "123432123432123****.000000" },
+	{ 1.234321234321234e19, "123432123432123*****.000000" },
+	{ 1.234321234321234e20, "123432123432123******.000000" },
+	{ 1.234321234321234e21, "123432123432123*******.000000" },
+	{ 1.234321234321234e22, "123432123432123********.000000" },
+	{ 1.234321234321234e23, "123432123432123*********.000000" },
+	{ 1.234321234321234e24, "123432123432123**********.000000" },
+	{ 1.234321234321234e25, "123432123432123***********.000000" },
+	{ 1.234321234321234e26, "123432123432123************.000000" },
+	{ 1.234321234321234e27, "123432123432123*************.000000" },
+	{ 1.234321234321234e28, "123432123432123**************.000000" },
+	{ 1.234321234321234e29, "123432123432123***************.000000" },
+	{ 1.234321234321234e30, "123432123432123****************.000000" },
+	{ 1.234321234321234e31, "123432123432123*****************.000000" },
+	{ 1.234321234321234e32, "123432123432123******************.000000" },
+	{ 1.234321234321234e33, "123432123432123*******************.000000" },
+	{ 1.234321234321234e34, "123432123432123********************.000000" },
+	{ 1.234321234321234e35, "123432123432123*********************.000000" },
+	{ 1.234321234321234e36, "123432123432123**********************.000000" }
+      };
+    size_t k;
+    for (k = 0; k < SIZEOF (data); k++)
+      {
+	size_t length;
+	char *result =
+	  my_asnprintf (NULL, &length, "%f", data[k].value);
+	ASSERT (result != NULL);
+	ASSERT (strmatch (data[k].string, result));
+	ASSERT (length == strlen (result));
+	free (result);
+      }
+  }
+
   { /* A negative number.  */
     size_t length;
     char *result =
@@ -800,7 +1056,8 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     char *result =
       my_asnprintf (NULL, &length, "%f %d", -0.0, 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, "-0.000000 33") == 0);
+    if (have_minus_zero ())
+      ASSERT (strcmp (result, "-0.000000 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
@@ -832,7 +1089,9 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     char *result =
       my_asnprintf (NULL, &length, "%f %d", NaN (), 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, "nan 33") == 0);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
@@ -921,9 +1180,11 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
   { /* FLAG_ZERO with NaN.  */
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%015f %d", NaN (), 33, 44, 55);
+      my_asnprintf (NULL, &length, "%050f %d", NaN (), 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, "            nan 33") == 0);
+    ASSERT (strlen (result) == 50 + 3
+	    && strisnan (result, strspn (result, " "), strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
@@ -958,6 +1219,97 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     free (result);
   }
 
+  { /* Small and large positive numbers.  */
+    static struct { long double value; const char *string; } data[] =
+      {
+	{ 1.234321234321234e-37L, "0.000000" },
+	{ 1.234321234321234e-36L, "0.000000" },
+	{ 1.234321234321234e-35L, "0.000000" },
+	{ 1.234321234321234e-34L, "0.000000" },
+	{ 1.234321234321234e-33L, "0.000000" },
+	{ 1.234321234321234e-32L, "0.000000" },
+	{ 1.234321234321234e-31L, "0.000000" },
+	{ 1.234321234321234e-30L, "0.000000" },
+	{ 1.234321234321234e-29L, "0.000000" },
+	{ 1.234321234321234e-28L, "0.000000" },
+	{ 1.234321234321234e-27L, "0.000000" },
+	{ 1.234321234321234e-26L, "0.000000" },
+	{ 1.234321234321234e-25L, "0.000000" },
+	{ 1.234321234321234e-24L, "0.000000" },
+	{ 1.234321234321234e-23L, "0.000000" },
+	{ 1.234321234321234e-22L, "0.000000" },
+	{ 1.234321234321234e-21L, "0.000000" },
+	{ 1.234321234321234e-20L, "0.000000" },
+	{ 1.234321234321234e-19L, "0.000000" },
+	{ 1.234321234321234e-18L, "0.000000" },
+	{ 1.234321234321234e-17L, "0.000000" },
+	{ 1.234321234321234e-16L, "0.000000" },
+	{ 1.234321234321234e-15L, "0.000000" },
+	{ 1.234321234321234e-14L, "0.000000" },
+	{ 1.234321234321234e-13L, "0.000000" },
+	{ 1.234321234321234e-12L, "0.000000" },
+	{ 1.234321234321234e-11L, "0.000000" },
+	{ 1.234321234321234e-10L, "0.000000" },
+	{ 1.234321234321234e-9L, "0.000000" },
+	{ 1.234321234321234e-8L, "0.000000" },
+	{ 1.234321234321234e-7L, "0.000000" },
+	{ 1.234321234321234e-6L, "0.000001" },
+	{ 1.234321234321234e-5L, "0.000012" },
+	{ 1.234321234321234e-4L, "0.000123" },
+	{ 1.234321234321234e-3L, "0.001234" },
+	{ 1.234321234321234e-2L, "0.012343" },
+	{ 1.234321234321234e-1L, "0.123432" },
+	{ 1.234321234321234L, "1.234321" },
+	{ 1.234321234321234e1L, "12.343212" },
+	{ 1.234321234321234e2L, "123.432123" },
+	{ 1.234321234321234e3L, "1234.321234" },
+	{ 1.234321234321234e4L, "12343.212343" },
+	{ 1.234321234321234e5L, "123432.123432" },
+	{ 1.234321234321234e6L, "1234321.234321" },
+	{ 1.234321234321234e7L, "12343212.343212" },
+	{ 1.234321234321234e8L, "123432123.432123" },
+	{ 1.234321234321234e9L, "1234321234.321234" },
+	{ 1.234321234321234e10L, "12343212343.2123**" },
+	{ 1.234321234321234e11L, "123432123432.123***" },
+	{ 1.234321234321234e12L, "1234321234321.23****" },
+	{ 1.234321234321234e13L, "12343212343212.3*****" },
+	{ 1.234321234321234e14L, "123432123432123.******" },
+	{ 1.234321234321234e15L, "1234321234321234.000000" },
+	{ 1.234321234321234e16L, "123432123432123**.000000" },
+	{ 1.234321234321234e17L, "123432123432123***.000000" },
+	{ 1.234321234321234e18L, "123432123432123****.000000" },
+	{ 1.234321234321234e19L, "123432123432123*****.000000" },
+	{ 1.234321234321234e20L, "123432123432123******.000000" },
+	{ 1.234321234321234e21L, "123432123432123*******.000000" },
+	{ 1.234321234321234e22L, "123432123432123********.000000" },
+	{ 1.234321234321234e23L, "123432123432123*********.000000" },
+	{ 1.234321234321234e24L, "123432123432123**********.000000" },
+	{ 1.234321234321234e25L, "123432123432123***********.000000" },
+	{ 1.234321234321234e26L, "123432123432123************.000000" },
+	{ 1.234321234321234e27L, "123432123432123*************.000000" },
+	{ 1.234321234321234e28L, "123432123432123**************.000000" },
+	{ 1.234321234321234e29L, "123432123432123***************.000000" },
+	{ 1.234321234321234e30L, "123432123432123****************.000000" },
+	{ 1.234321234321234e31L, "123432123432123*****************.000000" },
+	{ 1.234321234321234e32L, "123432123432123******************.000000" },
+	{ 1.234321234321234e33L, "123432123432123*******************.000000" },
+	{ 1.234321234321234e34L, "123432123432123********************.000000" },
+	{ 1.234321234321234e35L, "123432123432123*********************.000000" },
+	{ 1.234321234321234e36L, "123432123432123**********************.000000" }
+      };
+    size_t k;
+    for (k = 0; k < SIZEOF (data); k++)
+      {
+	size_t length;
+	char *result =
+	  my_asnprintf (NULL, &length, "%Lf", data[k].value);
+	ASSERT (result != NULL);
+	ASSERT (strmatch (data[k].string, result));
+	ASSERT (length == strlen (result));
+	free (result);
+      }
+  }
+
   { /* A negative number.  */
     size_t length;
     char *result =
@@ -983,7 +1335,8 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     char *result =
       my_asnprintf (NULL, &length, "%Lf %d", -0.0L, 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, "-0.000000 33") == 0);
+    if (have_minus_zero ())
+      ASSERT (strcmp (result, "-0.000000 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
@@ -1016,10 +1369,113 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     char *result =
       my_asnprintf (NULL, &length, "%Lf %d", zero / zero, 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, "nan 33") == 0);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+#if CHECK_PRINTF_SAFE && ((defined __ia64 && LDBL_MANT_DIG == 64) || (defined __x86_64__ || defined __amd64__) || (defined __i386 || defined __i386__ || defined _I386 || defined _M_IX86 || defined _X86_))
+  { /* Quiet NaN.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0xC3333333, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lf %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  {
+    /* Signalling NaN.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0x83333333, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lf %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  /* The isnanl function should recognize Pseudo-NaNs, Pseudo-Infinities,
+     Pseudo-Zeroes, Unnormalized Numbers, and Pseudo-Denormals, as defined in
+       Intel IA-64 Architecture Software Developer's Manual, Volume 1:
+       Application Architecture.
+       Table 5-2 "Floating-Point Register Encodings"
+       Figure 5-6 "Memory to Floating-Point Register Data Translation"
+   */
+  { /* Pseudo-NaN.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0x40000001, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lf %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  { /* Pseudo-Infinity.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0x00000000, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lf %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  { /* Pseudo-Zero.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0x4004, 0x00000000, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lf %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  { /* Unnormalized number.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0x4000, 0x63333333, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lf %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  { /* Pseudo-Denormal.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0x0000, 0x83333333, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lf %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
+#endif
 
   { /* Width.  */
     size_t length;
@@ -1106,9 +1562,11 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     static long double zero = 0.0L;
     size_t length;
     char *result =
-      my_asnprintf (NULL, &length, "%015Lf %d", zero / zero, 33, 44, 55);
+      my_asnprintf (NULL, &length, "%050Lf %d", zero / zero, 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, "            nan 33") == 0);
+    ASSERT (strlen (result) == 50 + 3
+	    && strisnan (result, strspn (result, " "), strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
@@ -1170,7 +1628,8 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     char *result =
       my_asnprintf (NULL, &length, "%F %d", -0.0, 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, "-0.000000 33") == 0);
+    if (have_minus_zero ())
+      ASSERT (strcmp (result, "-0.000000 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
@@ -1202,7 +1661,9 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     char *result =
       my_asnprintf (NULL, &length, "%F %d", NaN (), 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, "NAN 33") == 0);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 1)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
@@ -1283,7 +1744,8 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     char *result =
       my_asnprintf (NULL, &length, "%LF %d", -0.0L, 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, "-0.000000 33") == 0);
+    if (have_minus_zero ())
+      ASSERT (strcmp (result, "-0.000000 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
@@ -1316,7 +1778,9 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     char *result =
       my_asnprintf (NULL, &length, "%LF %d", zero / zero, 33, 44, 55);
     ASSERT (result != NULL);
-    ASSERT (strcmp (result, "NAN 33") == 0);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 1)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
     ASSERT (length == strlen (result));
     free (result);
   }
@@ -1352,6 +1816,1406 @@ test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
     free (result);
   }
 
+  /* Test the support of the %e format directive.  */
+
+  { /* A positive number.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%e %d", 12.75, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1.275000e+01 33") == 0
+	    || strcmp (result, "1.275000e+001 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* A larger positive number.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%e %d", 1234567.0, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1.234567e+06 33") == 0
+	    || strcmp (result, "1.234567e+006 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Small and large positive numbers.  */
+    static struct { double value; const char *string; } data[] =
+      {
+	{ 1.234321234321234e-37, "1.234321e-37" },
+	{ 1.234321234321234e-36, "1.234321e-36" },
+	{ 1.234321234321234e-35, "1.234321e-35" },
+	{ 1.234321234321234e-34, "1.234321e-34" },
+	{ 1.234321234321234e-33, "1.234321e-33" },
+	{ 1.234321234321234e-32, "1.234321e-32" },
+	{ 1.234321234321234e-31, "1.234321e-31" },
+	{ 1.234321234321234e-30, "1.234321e-30" },
+	{ 1.234321234321234e-29, "1.234321e-29" },
+	{ 1.234321234321234e-28, "1.234321e-28" },
+	{ 1.234321234321234e-27, "1.234321e-27" },
+	{ 1.234321234321234e-26, "1.234321e-26" },
+	{ 1.234321234321234e-25, "1.234321e-25" },
+	{ 1.234321234321234e-24, "1.234321e-24" },
+	{ 1.234321234321234e-23, "1.234321e-23" },
+	{ 1.234321234321234e-22, "1.234321e-22" },
+	{ 1.234321234321234e-21, "1.234321e-21" },
+	{ 1.234321234321234e-20, "1.234321e-20" },
+	{ 1.234321234321234e-19, "1.234321e-19" },
+	{ 1.234321234321234e-18, "1.234321e-18" },
+	{ 1.234321234321234e-17, "1.234321e-17" },
+	{ 1.234321234321234e-16, "1.234321e-16" },
+	{ 1.234321234321234e-15, "1.234321e-15" },
+	{ 1.234321234321234e-14, "1.234321e-14" },
+	{ 1.234321234321234e-13, "1.234321e-13" },
+	{ 1.234321234321234e-12, "1.234321e-12" },
+	{ 1.234321234321234e-11, "1.234321e-11" },
+	{ 1.234321234321234e-10, "1.234321e-10" },
+	{ 1.234321234321234e-9, "1.234321e-09" },
+	{ 1.234321234321234e-8, "1.234321e-08" },
+	{ 1.234321234321234e-7, "1.234321e-07" },
+	{ 1.234321234321234e-6, "1.234321e-06" },
+	{ 1.234321234321234e-5, "1.234321e-05" },
+	{ 1.234321234321234e-4, "1.234321e-04" },
+	{ 1.234321234321234e-3, "1.234321e-03" },
+	{ 1.234321234321234e-2, "1.234321e-02" },
+	{ 1.234321234321234e-1, "1.234321e-01" },
+	{ 1.234321234321234, "1.234321e+00" },
+	{ 1.234321234321234e1, "1.234321e+01" },
+	{ 1.234321234321234e2, "1.234321e+02" },
+	{ 1.234321234321234e3, "1.234321e+03" },
+	{ 1.234321234321234e4, "1.234321e+04" },
+	{ 1.234321234321234e5, "1.234321e+05" },
+	{ 1.234321234321234e6, "1.234321e+06" },
+	{ 1.234321234321234e7, "1.234321e+07" },
+	{ 1.234321234321234e8, "1.234321e+08" },
+	{ 1.234321234321234e9, "1.234321e+09" },
+	{ 1.234321234321234e10, "1.234321e+10" },
+	{ 1.234321234321234e11, "1.234321e+11" },
+	{ 1.234321234321234e12, "1.234321e+12" },
+	{ 1.234321234321234e13, "1.234321e+13" },
+	{ 1.234321234321234e14, "1.234321e+14" },
+	{ 1.234321234321234e15, "1.234321e+15" },
+	{ 1.234321234321234e16, "1.234321e+16" },
+	{ 1.234321234321234e17, "1.234321e+17" },
+	{ 1.234321234321234e18, "1.234321e+18" },
+	{ 1.234321234321234e19, "1.234321e+19" },
+	{ 1.234321234321234e20, "1.234321e+20" },
+	{ 1.234321234321234e21, "1.234321e+21" },
+	{ 1.234321234321234e22, "1.234321e+22" },
+	{ 1.234321234321234e23, "1.234321e+23" },
+	{ 1.234321234321234e24, "1.234321e+24" },
+	{ 1.234321234321234e25, "1.234321e+25" },
+	{ 1.234321234321234e26, "1.234321e+26" },
+	{ 1.234321234321234e27, "1.234321e+27" },
+	{ 1.234321234321234e28, "1.234321e+28" },
+	{ 1.234321234321234e29, "1.234321e+29" },
+	{ 1.234321234321234e30, "1.234321e+30" },
+	{ 1.234321234321234e31, "1.234321e+31" },
+	{ 1.234321234321234e32, "1.234321e+32" },
+	{ 1.234321234321234e33, "1.234321e+33" },
+	{ 1.234321234321234e34, "1.234321e+34" },
+	{ 1.234321234321234e35, "1.234321e+35" },
+	{ 1.234321234321234e36, "1.234321e+36" }
+      };
+    size_t k;
+    for (k = 0; k < SIZEOF (data); k++)
+      {
+	size_t length;
+	char *result =
+	  my_asnprintf (NULL, &length, "%e", data[k].value);
+	const char *expected = data[k].string;
+	ASSERT (result != NULL);
+	ASSERT (strcmp (result, expected) == 0
+		/* Some implementations produce exponents with 3 digits.  */
+		|| (strlen (result) == strlen (expected) + 1
+		    && memcmp (result, expected, strlen (expected) - 2) == 0
+		    && result[strlen (expected) - 2] == '0'
+		    && strcmp (result + strlen (expected) - 1,
+			       expected + strlen (expected) - 2)
+		       == 0));
+	ASSERT (length == strlen (result));
+	free (result);
+      }
+  }
+
+  { /* A negative number.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%e %d", -0.03125, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "-3.125000e-02 33") == 0
+	    || strcmp (result, "-3.125000e-002 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Positive zero.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%e %d", 0.0, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "0.000000e+00 33") == 0
+	    || strcmp (result, "0.000000e+000 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Negative zero.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%e %d", -0.0, 33, 44, 55);
+    ASSERT (result != NULL);
+    if (have_minus_zero ())
+      ASSERT (strcmp (result, "-0.000000e+00 33") == 0
+	      || strcmp (result, "-0.000000e+000 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Positive infinity.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%e %d", 1.0 / 0.0, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "inf 33") == 0
+	    || strcmp (result, "infinity 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Negative infinity.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%e %d", -1.0 / 0.0, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "-inf 33") == 0
+	    || strcmp (result, "-infinity 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* NaN.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%e %d", NaN (), 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Width.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%15e %d", 1.75, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "   1.750000e+00 33") == 0
+	    || strcmp (result, "  1.750000e+000 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_LEFT.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%-15e %d", 1.75, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1.750000e+00    33") == 0
+	    || strcmp (result, "1.750000e+000   33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_SHOWSIGN.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%+e %d", 1.75, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "+1.750000e+00 33") == 0
+	    || strcmp (result, "+1.750000e+000 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_SPACE.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "% e %d", 1.75, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, " 1.750000e+00 33") == 0
+	    || strcmp (result, " 1.750000e+000 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_ALT.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%#e %d", 1.75, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1.750000e+00 33") == 0
+	    || strcmp (result, "1.750000e+000 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_ALT.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%#.e %d", 1.75, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "2.e+00 33") == 0
+	    || strcmp (result, "2.e+000 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_ALT.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%#.e %d", 9.75, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1.e+01 33") == 0
+	    || strcmp (result, "1.e+001 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_ZERO with finite number.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%015e %d", 1234.0, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "0001.234000e+03 33") == 0
+	    || strcmp (result, "001.234000e+003 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_ZERO with infinite number.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%015e %d", -1.0 / 0.0, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "           -inf 33") == 0
+	    || strcmp (result, "      -infinity 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_ZERO with NaN.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%050e %d", NaN (), 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) == 50 + 3
+	    && strisnan (result, strspn (result, " "), strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Precision.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%.e %d", 1234.0, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1e+03 33") == 0
+	    || strcmp (result, "1e+003 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* A positive number.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Le %d", 12.75L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1.275000e+01 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* A larger positive number.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Le %d", 1234567.0L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1.234567e+06 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Small and large positive numbers.  */
+    static struct { long double value; const char *string; } data[] =
+      {
+	{ 1.234321234321234e-37L, "1.234321e-37" },
+	{ 1.234321234321234e-36L, "1.234321e-36" },
+	{ 1.234321234321234e-35L, "1.234321e-35" },
+	{ 1.234321234321234e-34L, "1.234321e-34" },
+	{ 1.234321234321234e-33L, "1.234321e-33" },
+	{ 1.234321234321234e-32L, "1.234321e-32" },
+	{ 1.234321234321234e-31L, "1.234321e-31" },
+	{ 1.234321234321234e-30L, "1.234321e-30" },
+	{ 1.234321234321234e-29L, "1.234321e-29" },
+	{ 1.234321234321234e-28L, "1.234321e-28" },
+	{ 1.234321234321234e-27L, "1.234321e-27" },
+	{ 1.234321234321234e-26L, "1.234321e-26" },
+	{ 1.234321234321234e-25L, "1.234321e-25" },
+	{ 1.234321234321234e-24L, "1.234321e-24" },
+	{ 1.234321234321234e-23L, "1.234321e-23" },
+	{ 1.234321234321234e-22L, "1.234321e-22" },
+	{ 1.234321234321234e-21L, "1.234321e-21" },
+	{ 1.234321234321234e-20L, "1.234321e-20" },
+	{ 1.234321234321234e-19L, "1.234321e-19" },
+	{ 1.234321234321234e-18L, "1.234321e-18" },
+	{ 1.234321234321234e-17L, "1.234321e-17" },
+	{ 1.234321234321234e-16L, "1.234321e-16" },
+	{ 1.234321234321234e-15L, "1.234321e-15" },
+	{ 1.234321234321234e-14L, "1.234321e-14" },
+	{ 1.234321234321234e-13L, "1.234321e-13" },
+	{ 1.234321234321234e-12L, "1.234321e-12" },
+	{ 1.234321234321234e-11L, "1.234321e-11" },
+	{ 1.234321234321234e-10L, "1.234321e-10" },
+	{ 1.234321234321234e-9L, "1.234321e-09" },
+	{ 1.234321234321234e-8L, "1.234321e-08" },
+	{ 1.234321234321234e-7L, "1.234321e-07" },
+	{ 1.234321234321234e-6L, "1.234321e-06" },
+	{ 1.234321234321234e-5L, "1.234321e-05" },
+	{ 1.234321234321234e-4L, "1.234321e-04" },
+	{ 1.234321234321234e-3L, "1.234321e-03" },
+	{ 1.234321234321234e-2L, "1.234321e-02" },
+	{ 1.234321234321234e-1L, "1.234321e-01" },
+	{ 1.234321234321234L, "1.234321e+00" },
+	{ 1.234321234321234e1L, "1.234321e+01" },
+	{ 1.234321234321234e2L, "1.234321e+02" },
+	{ 1.234321234321234e3L, "1.234321e+03" },
+	{ 1.234321234321234e4L, "1.234321e+04" },
+	{ 1.234321234321234e5L, "1.234321e+05" },
+	{ 1.234321234321234e6L, "1.234321e+06" },
+	{ 1.234321234321234e7L, "1.234321e+07" },
+	{ 1.234321234321234e8L, "1.234321e+08" },
+	{ 1.234321234321234e9L, "1.234321e+09" },
+	{ 1.234321234321234e10L, "1.234321e+10" },
+	{ 1.234321234321234e11L, "1.234321e+11" },
+	{ 1.234321234321234e12L, "1.234321e+12" },
+	{ 1.234321234321234e13L, "1.234321e+13" },
+	{ 1.234321234321234e14L, "1.234321e+14" },
+	{ 1.234321234321234e15L, "1.234321e+15" },
+	{ 1.234321234321234e16L, "1.234321e+16" },
+	{ 1.234321234321234e17L, "1.234321e+17" },
+	{ 1.234321234321234e18L, "1.234321e+18" },
+	{ 1.234321234321234e19L, "1.234321e+19" },
+	{ 1.234321234321234e20L, "1.234321e+20" },
+	{ 1.234321234321234e21L, "1.234321e+21" },
+	{ 1.234321234321234e22L, "1.234321e+22" },
+	{ 1.234321234321234e23L, "1.234321e+23" },
+	{ 1.234321234321234e24L, "1.234321e+24" },
+	{ 1.234321234321234e25L, "1.234321e+25" },
+	{ 1.234321234321234e26L, "1.234321e+26" },
+	{ 1.234321234321234e27L, "1.234321e+27" },
+	{ 1.234321234321234e28L, "1.234321e+28" },
+	{ 1.234321234321234e29L, "1.234321e+29" },
+	{ 1.234321234321234e30L, "1.234321e+30" },
+	{ 1.234321234321234e31L, "1.234321e+31" },
+	{ 1.234321234321234e32L, "1.234321e+32" },
+	{ 1.234321234321234e33L, "1.234321e+33" },
+	{ 1.234321234321234e34L, "1.234321e+34" },
+	{ 1.234321234321234e35L, "1.234321e+35" },
+	{ 1.234321234321234e36L, "1.234321e+36" }
+      };
+    size_t k;
+    for (k = 0; k < SIZEOF (data); k++)
+      {
+	size_t length;
+	char *result =
+	  my_asnprintf (NULL, &length, "%Le", data[k].value);
+	ASSERT (result != NULL);
+	ASSERT (strcmp (result, data[k].string) == 0);
+	ASSERT (length == strlen (result));
+	free (result);
+      }
+  }
+
+  { /* A negative number.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Le %d", -0.03125L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "-3.125000e-02 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Positive zero.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Le %d", 0.0L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "0.000000e+00 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Negative zero.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Le %d", -0.0L, 33, 44, 55);
+    ASSERT (result != NULL);
+    if (have_minus_zero ())
+      ASSERT (strcmp (result, "-0.000000e+00 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Positive infinity.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Le %d", 1.0L / 0.0L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "inf 33") == 0
+	    || strcmp (result, "infinity 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Negative infinity.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Le %d", -1.0L / 0.0L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "-inf 33") == 0
+	    || strcmp (result, "-infinity 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* NaN.  */
+    static long double zero = 0.0L;
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Le %d", zero / zero, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+#if CHECK_PRINTF_SAFE && ((defined __ia64 && LDBL_MANT_DIG == 64) || (defined __x86_64__ || defined __amd64__) || (defined __i386 || defined __i386__ || defined _I386 || defined _M_IX86 || defined _X86_))
+  { /* Quiet NaN.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0xC3333333, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Le %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  {
+    /* Signalling NaN.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0x83333333, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Le %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  /* The isnanl function should recognize Pseudo-NaNs, Pseudo-Infinities,
+     Pseudo-Zeroes, Unnormalized Numbers, and Pseudo-Denormals, as defined in
+       Intel IA-64 Architecture Software Developer's Manual, Volume 1:
+       Application Architecture.
+       Table 5-2 "Floating-Point Register Encodings"
+       Figure 5-6 "Memory to Floating-Point Register Data Translation"
+   */
+  { /* Pseudo-NaN.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0x40000001, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Le %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  { /* Pseudo-Infinity.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0x00000000, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Le %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  { /* Pseudo-Zero.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0x4004, 0x00000000, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Le %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  { /* Unnormalized number.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0x4000, 0x63333333, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Le %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  { /* Pseudo-Denormal.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0x0000, 0x83333333, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Le %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+#endif
+
+  { /* Width.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%15Le %d", 1.75L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "   1.750000e+00 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_LEFT.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%-15Le %d", 1.75L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1.750000e+00    33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_SHOWSIGN.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%+Le %d", 1.75L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "+1.750000e+00 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_SPACE.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "% Le %d", 1.75L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, " 1.750000e+00 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_ALT.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%#Le %d", 1.75L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1.750000e+00 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_ALT.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%#.Le %d", 1.75L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "2.e+00 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_ALT.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%#.Le %d", 9.75L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1.e+01 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_ZERO with finite number.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%015Le %d", 1234.0L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "0001.234000e+03 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_ZERO with infinite number.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%015Le %d", -1.0L / 0.0L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "           -inf 33") == 0
+	    || strcmp (result, "      -infinity 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_ZERO with NaN.  */
+    static long double zero = 0.0L;
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%050Le %d", zero / zero, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) == 50 + 3
+	    && strisnan (result, strspn (result, " "), strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Precision.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%.Le %d", 1234.0L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1e+03 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  /* Test the support of the %g format directive.  */
+
+  { /* A positive number.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%g %d", 12.75, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "12.75 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* A larger positive number.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%g %d", 1234567.0, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1.23457e+06 33") == 0
+	    || strcmp (result, "1.23457e+006 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Small and large positive numbers.  */
+    static struct { double value; const char *string; } data[] =
+      {
+	{ 1.234321234321234e-37, "1.23432e-37" },
+	{ 1.234321234321234e-36, "1.23432e-36" },
+	{ 1.234321234321234e-35, "1.23432e-35" },
+	{ 1.234321234321234e-34, "1.23432e-34" },
+	{ 1.234321234321234e-33, "1.23432e-33" },
+	{ 1.234321234321234e-32, "1.23432e-32" },
+	{ 1.234321234321234e-31, "1.23432e-31" },
+	{ 1.234321234321234e-30, "1.23432e-30" },
+	{ 1.234321234321234e-29, "1.23432e-29" },
+	{ 1.234321234321234e-28, "1.23432e-28" },
+	{ 1.234321234321234e-27, "1.23432e-27" },
+	{ 1.234321234321234e-26, "1.23432e-26" },
+	{ 1.234321234321234e-25, "1.23432e-25" },
+	{ 1.234321234321234e-24, "1.23432e-24" },
+	{ 1.234321234321234e-23, "1.23432e-23" },
+	{ 1.234321234321234e-22, "1.23432e-22" },
+	{ 1.234321234321234e-21, "1.23432e-21" },
+	{ 1.234321234321234e-20, "1.23432e-20" },
+	{ 1.234321234321234e-19, "1.23432e-19" },
+	{ 1.234321234321234e-18, "1.23432e-18" },
+	{ 1.234321234321234e-17, "1.23432e-17" },
+	{ 1.234321234321234e-16, "1.23432e-16" },
+	{ 1.234321234321234e-15, "1.23432e-15" },
+	{ 1.234321234321234e-14, "1.23432e-14" },
+	{ 1.234321234321234e-13, "1.23432e-13" },
+	{ 1.234321234321234e-12, "1.23432e-12" },
+	{ 1.234321234321234e-11, "1.23432e-11" },
+	{ 1.234321234321234e-10, "1.23432e-10" },
+	{ 1.234321234321234e-9, "1.23432e-09" },
+	{ 1.234321234321234e-8, "1.23432e-08" },
+	{ 1.234321234321234e-7, "1.23432e-07" },
+	{ 1.234321234321234e-6, "1.23432e-06" },
+	{ 1.234321234321234e-5, "1.23432e-05" },
+	{ 1.234321234321234e-4, "0.000123432" },
+	{ 1.234321234321234e-3, "0.00123432" },
+	{ 1.234321234321234e-2, "0.0123432" },
+	{ 1.234321234321234e-1, "0.123432" },
+	{ 1.234321234321234, "1.23432" },
+	{ 1.234321234321234e1, "12.3432" },
+	{ 1.234321234321234e2, "123.432" },
+	{ 1.234321234321234e3, "1234.32" },
+	{ 1.234321234321234e4, "12343.2" },
+	{ 1.234321234321234e5, "123432" },
+	{ 1.234321234321234e6, "1.23432e+06" },
+	{ 1.234321234321234e7, "1.23432e+07" },
+	{ 1.234321234321234e8, "1.23432e+08" },
+	{ 1.234321234321234e9, "1.23432e+09" },
+	{ 1.234321234321234e10, "1.23432e+10" },
+	{ 1.234321234321234e11, "1.23432e+11" },
+	{ 1.234321234321234e12, "1.23432e+12" },
+	{ 1.234321234321234e13, "1.23432e+13" },
+	{ 1.234321234321234e14, "1.23432e+14" },
+	{ 1.234321234321234e15, "1.23432e+15" },
+	{ 1.234321234321234e16, "1.23432e+16" },
+	{ 1.234321234321234e17, "1.23432e+17" },
+	{ 1.234321234321234e18, "1.23432e+18" },
+	{ 1.234321234321234e19, "1.23432e+19" },
+	{ 1.234321234321234e20, "1.23432e+20" },
+	{ 1.234321234321234e21, "1.23432e+21" },
+	{ 1.234321234321234e22, "1.23432e+22" },
+	{ 1.234321234321234e23, "1.23432e+23" },
+	{ 1.234321234321234e24, "1.23432e+24" },
+	{ 1.234321234321234e25, "1.23432e+25" },
+	{ 1.234321234321234e26, "1.23432e+26" },
+	{ 1.234321234321234e27, "1.23432e+27" },
+	{ 1.234321234321234e28, "1.23432e+28" },
+	{ 1.234321234321234e29, "1.23432e+29" },
+	{ 1.234321234321234e30, "1.23432e+30" },
+	{ 1.234321234321234e31, "1.23432e+31" },
+	{ 1.234321234321234e32, "1.23432e+32" },
+	{ 1.234321234321234e33, "1.23432e+33" },
+	{ 1.234321234321234e34, "1.23432e+34" },
+	{ 1.234321234321234e35, "1.23432e+35" },
+	{ 1.234321234321234e36, "1.23432e+36" }
+      };
+    size_t k;
+    for (k = 0; k < SIZEOF (data); k++)
+      {
+	size_t length;
+	char *result =
+	  my_asnprintf (NULL, &length, "%g", data[k].value);
+	const char *expected = data[k].string;
+	ASSERT (result != NULL);
+	ASSERT (strcmp (result, expected) == 0
+		/* Some implementations produce exponents with 3 digits.  */
+		|| (expected[strlen (expected) - 4] == 'e'
+		    && strlen (result) == strlen (expected) + 1
+		    && memcmp (result, expected, strlen (expected) - 2) == 0
+		    && result[strlen (expected) - 2] == '0'
+		    && strcmp (result + strlen (expected) - 1,
+			       expected + strlen (expected) - 2)
+		       == 0));
+	ASSERT (length == strlen (result));
+	free (result);
+      }
+  }
+
+  { /* A negative number.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%g %d", -0.03125, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "-0.03125 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Positive zero.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%g %d", 0.0, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "0 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Negative zero.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%g %d", -0.0, 33, 44, 55);
+    ASSERT (result != NULL);
+    if (have_minus_zero ())
+      ASSERT (strcmp (result, "-0 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Positive infinity.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%g %d", 1.0 / 0.0, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "inf 33") == 0
+	    || strcmp (result, "infinity 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Negative infinity.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%g %d", -1.0 / 0.0, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "-inf 33") == 0
+	    || strcmp (result, "-infinity 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* NaN.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%g %d", NaN (), 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Width.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%10g %d", 1.75, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "      1.75 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_LEFT.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%-10g %d", 1.75, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1.75       33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_SHOWSIGN.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%+g %d", 1.75, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "+1.75 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_SPACE.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "% g %d", 1.75, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, " 1.75 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_ALT.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%#g %d", 1.75, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1.75000 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_ALT.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%#.g %d", 1.75, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "2. 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_ALT.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%#.g %d", 9.75, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1.e+01 33") == 0
+	    || strcmp (result, "1.e+001 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_ZERO with finite number.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%010g %d", 1234.0, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "0000001234 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_ZERO with infinite number.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%015g %d", -1.0 / 0.0, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "           -inf 33") == 0
+	    || strcmp (result, "      -infinity 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_ZERO with NaN.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%050g %d", NaN (), 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) == 50 + 3
+	    && strisnan (result, strspn (result, " "), strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Precision.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%.g %d", 1234.0, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1e+03 33") == 0
+	    || strcmp (result, "1e+003 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* A positive number.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lg %d", 12.75L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "12.75 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* A larger positive number.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lg %d", 1234567.0L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1.23457e+06 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Small and large positive numbers.  */
+    static struct { long double value; const char *string; } data[] =
+      {
+	{ 1.234321234321234e-37L, "1.23432e-37" },
+	{ 1.234321234321234e-36L, "1.23432e-36" },
+	{ 1.234321234321234e-35L, "1.23432e-35" },
+	{ 1.234321234321234e-34L, "1.23432e-34" },
+	{ 1.234321234321234e-33L, "1.23432e-33" },
+	{ 1.234321234321234e-32L, "1.23432e-32" },
+	{ 1.234321234321234e-31L, "1.23432e-31" },
+	{ 1.234321234321234e-30L, "1.23432e-30" },
+	{ 1.234321234321234e-29L, "1.23432e-29" },
+	{ 1.234321234321234e-28L, "1.23432e-28" },
+	{ 1.234321234321234e-27L, "1.23432e-27" },
+	{ 1.234321234321234e-26L, "1.23432e-26" },
+	{ 1.234321234321234e-25L, "1.23432e-25" },
+	{ 1.234321234321234e-24L, "1.23432e-24" },
+	{ 1.234321234321234e-23L, "1.23432e-23" },
+	{ 1.234321234321234e-22L, "1.23432e-22" },
+	{ 1.234321234321234e-21L, "1.23432e-21" },
+	{ 1.234321234321234e-20L, "1.23432e-20" },
+	{ 1.234321234321234e-19L, "1.23432e-19" },
+	{ 1.234321234321234e-18L, "1.23432e-18" },
+	{ 1.234321234321234e-17L, "1.23432e-17" },
+	{ 1.234321234321234e-16L, "1.23432e-16" },
+	{ 1.234321234321234e-15L, "1.23432e-15" },
+	{ 1.234321234321234e-14L, "1.23432e-14" },
+	{ 1.234321234321234e-13L, "1.23432e-13" },
+	{ 1.234321234321234e-12L, "1.23432e-12" },
+	{ 1.234321234321234e-11L, "1.23432e-11" },
+	{ 1.234321234321234e-10L, "1.23432e-10" },
+	{ 1.234321234321234e-9L, "1.23432e-09" },
+	{ 1.234321234321234e-8L, "1.23432e-08" },
+	{ 1.234321234321234e-7L, "1.23432e-07" },
+	{ 1.234321234321234e-6L, "1.23432e-06" },
+	{ 1.234321234321234e-5L, "1.23432e-05" },
+	{ 1.234321234321234e-4L, "0.000123432" },
+	{ 1.234321234321234e-3L, "0.00123432" },
+	{ 1.234321234321234e-2L, "0.0123432" },
+	{ 1.234321234321234e-1L, "0.123432" },
+	{ 1.234321234321234L, "1.23432" },
+	{ 1.234321234321234e1L, "12.3432" },
+	{ 1.234321234321234e2L, "123.432" },
+	{ 1.234321234321234e3L, "1234.32" },
+	{ 1.234321234321234e4L, "12343.2" },
+	{ 1.234321234321234e5L, "123432" },
+	{ 1.234321234321234e6L, "1.23432e+06" },
+	{ 1.234321234321234e7L, "1.23432e+07" },
+	{ 1.234321234321234e8L, "1.23432e+08" },
+	{ 1.234321234321234e9L, "1.23432e+09" },
+	{ 1.234321234321234e10L, "1.23432e+10" },
+	{ 1.234321234321234e11L, "1.23432e+11" },
+	{ 1.234321234321234e12L, "1.23432e+12" },
+	{ 1.234321234321234e13L, "1.23432e+13" },
+	{ 1.234321234321234e14L, "1.23432e+14" },
+	{ 1.234321234321234e15L, "1.23432e+15" },
+	{ 1.234321234321234e16L, "1.23432e+16" },
+	{ 1.234321234321234e17L, "1.23432e+17" },
+	{ 1.234321234321234e18L, "1.23432e+18" },
+	{ 1.234321234321234e19L, "1.23432e+19" },
+	{ 1.234321234321234e20L, "1.23432e+20" },
+	{ 1.234321234321234e21L, "1.23432e+21" },
+	{ 1.234321234321234e22L, "1.23432e+22" },
+	{ 1.234321234321234e23L, "1.23432e+23" },
+	{ 1.234321234321234e24L, "1.23432e+24" },
+	{ 1.234321234321234e25L, "1.23432e+25" },
+	{ 1.234321234321234e26L, "1.23432e+26" },
+	{ 1.234321234321234e27L, "1.23432e+27" },
+	{ 1.234321234321234e28L, "1.23432e+28" },
+	{ 1.234321234321234e29L, "1.23432e+29" },
+	{ 1.234321234321234e30L, "1.23432e+30" },
+	{ 1.234321234321234e31L, "1.23432e+31" },
+	{ 1.234321234321234e32L, "1.23432e+32" },
+	{ 1.234321234321234e33L, "1.23432e+33" },
+	{ 1.234321234321234e34L, "1.23432e+34" },
+	{ 1.234321234321234e35L, "1.23432e+35" },
+	{ 1.234321234321234e36L, "1.23432e+36" }
+      };
+    size_t k;
+    for (k = 0; k < SIZEOF (data); k++)
+      {
+	size_t length;
+	char *result =
+	  my_asnprintf (NULL, &length, "%Lg", data[k].value);
+	ASSERT (result != NULL);
+	ASSERT (strcmp (result, data[k].string) == 0);
+	ASSERT (length == strlen (result));
+	free (result);
+      }
+  }
+
+  { /* A negative number.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lg %d", -0.03125L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "-0.03125 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Positive zero.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lg %d", 0.0L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "0 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Negative zero.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lg %d", -0.0L, 33, 44, 55);
+    ASSERT (result != NULL);
+    if (have_minus_zero ())
+      ASSERT (strcmp (result, "-0 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Positive infinity.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lg %d", 1.0L / 0.0L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "inf 33") == 0
+	    || strcmp (result, "infinity 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Negative infinity.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lg %d", -1.0L / 0.0L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "-inf 33") == 0
+	    || strcmp (result, "-infinity 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* NaN.  */
+    static long double zero = 0.0L;
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lg %d", zero / zero, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+#if CHECK_PRINTF_SAFE && ((defined __ia64 && LDBL_MANT_DIG == 64) || (defined __x86_64__ || defined __amd64__) || (defined __i386 || defined __i386__ || defined _I386 || defined _M_IX86 || defined _X86_))
+  { /* Quiet NaN.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0xC3333333, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lg %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  {
+    /* Signalling NaN.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0x83333333, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lg %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  /* The isnanl function should recognize Pseudo-NaNs, Pseudo-Infinities,
+     Pseudo-Zeroes, Unnormalized Numbers, and Pseudo-Denormals, as defined in
+       Intel IA-64 Architecture Software Developer's Manual, Volume 1:
+       Application Architecture.
+       Table 5-2 "Floating-Point Register Encodings"
+       Figure 5-6 "Memory to Floating-Point Register Data Translation"
+   */
+  { /* Pseudo-NaN.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0x40000001, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lg %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  { /* Pseudo-Infinity.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0xFFFF, 0x00000000, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lg %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  { /* Pseudo-Zero.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0x4004, 0x00000000, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lg %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  { /* Unnormalized number.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0x4000, 0x63333333, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lg %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+  { /* Pseudo-Denormal.  */
+    static union { unsigned int word[4]; long double value; } x =
+      { LDBL80_WORDS (0x0000, 0x83333333, 0x00000000) };
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%Lg %d", x.value, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) >= 3 + 3
+	    && strisnan (result, 0, strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+#endif
+
+  { /* Width.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%10Lg %d", 1.75L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "      1.75 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_LEFT.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%-10Lg %d", 1.75L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1.75       33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_SHOWSIGN.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%+Lg %d", 1.75L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "+1.75 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_SPACE.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "% Lg %d", 1.75L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, " 1.75 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_ALT.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%#Lg %d", 1.75L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1.75000 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_ALT.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%#.Lg %d", 1.75L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "2. 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_ALT.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%#.Lg %d", 9.75L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1.e+01 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_ZERO with finite number.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%010Lg %d", 1234.0L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "0000001234 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_ZERO with infinite number.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%015Lg %d", -1.0L / 0.0L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "           -inf 33") == 0
+	    || strcmp (result, "      -infinity 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* FLAG_ZERO with NaN.  */
+    static long double zero = 0.0L;
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%050Lg %d", zero / zero, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strlen (result) == 50 + 3
+	    && strisnan (result, strspn (result, " "), strlen (result) - 3, 0)
+	    && strcmp (result + strlen (result) - 3, " 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
+  { /* Precision.  */
+    size_t length;
+    char *result =
+      my_asnprintf (NULL, &length, "%.Lg %d", 1234.0L, 33, 44, 55);
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "1e+03 33") == 0);
+    ASSERT (length == strlen (result));
+    free (result);
+  }
+
   /* Test the support of the %n format directive.  */
 
   {